Battery drain for 830 when switched off?

The battery lifetime when the device is on is really great. However, when I switch it off completely (i.e. Power off - not sleep!) battery drains completely. I did not remember this behaviour from my Edge 810....

Is there some setting I need to pick? Does the Edge wake up and does some updating in the background? I cannot imagine this, but still would like to know.

Parents
  • I have noticed a number of times when I turn it off, the off switch on the screen stays on.  Have to hold the power button for 15 sec of so to reboot when this happens.  Now I always try to observe that the screen goes completely blank when powering off.  As long as it is truly off, I do not notice any major battery drain.

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  • I have noticed a number of times when I turn it off, the off switch on the screen stays on.  Have to hold the power button for 15 sec of so to reboot when this happens.  Now I always try to observe that the screen goes completely blank when powering off.  As long as it is truly off, I do not notice any major battery drain.

Children